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Finding the Fourth Proportional to 238,720.67, 358,004.46 and 78,760.76

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Solution

The fourth proportional to 238,720.67, 358,004.46 and 78,760.76 is: 118,115.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,720.67 : 358,004.46 = 78,760.76 : x
  2. Step 2: Convert to fraction form
    238,720.67/358,004.46 = 78,760.76/x
  3. Step 3: Cross multiply
    238,720.67x = 358,004.46 × 78,760.76
  4. Step 4: Simplify right side
    238,720.67x = 28,196,703,352.99
  5. Step 5: Solve for x
    x = 28,196,703,352.99/238,720.67
  6. Step 6: Final answer
    x = 118,115.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.